This study examined personal and collegiate influences on Asian Pacific American college students' attitudes toward three racial/ethnic diversity issues. The study's organizing framework was a combination of Astin's I-E-O (inputs, environments, and outputs) model and Weidman's model of undergraduate socialization. Data were drawn from a longitudinal study of undergraduates at a large Midwestern research university and included responses from 184 Asian Pacific American students who responded to surveys in both fall 1990 and winter 1994. The study examined students' racial attitudes in three areas: (1) affirmative action principles, (2) affirmative action practices, and (3) existence of discriminatory inequality. Chi-square distributions and multiple regression analysis revealed that gender, academic major, sponsored academic programming, and perceptions of the racial climate affected Asian Pacific American students' attitudes toward affirmative action and perceptions of inequality. Tables and an appendix provide detailed analysis of the results. (Contains 55 references.) (DB)